CN101039386A - Receiver apparatus and receiver system - Google Patents
Receiver apparatus and receiver system Download PDFInfo
- Publication number
- CN101039386A CN101039386A CNA200610168688XA CN200610168688A CN101039386A CN 101039386 A CN101039386 A CN 101039386A CN A200610168688X A CNA200610168688X A CN A200610168688XA CN 200610168688 A CN200610168688 A CN 200610168688A CN 101039386 A CN101039386 A CN 101039386A
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- video
- digital
- signal
- audio
- demodulation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/41—Structure of client; Structure of client peripherals
- H04N21/426—Internal components of the client ; Characteristics thereof
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/41—Structure of client; Structure of client peripherals
- H04N21/426—Internal components of the client ; Characteristics thereof
- H04N21/42607—Internal components of the client ; Characteristics thereof for processing the incoming bitstream
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client
- H04N21/61—Network physical structure; Signal processing
- H04N21/6106—Network physical structure; Signal processing specially adapted to the downstream path of the transmission network
- H04N21/6112—Network physical structure; Signal processing specially adapted to the downstream path of the transmission network involving terrestrial transmission, e.g. DVB-T
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Structure Of Receivers (AREA)
Abstract
In a receiver apparatus that converts a radio-frequency signal received by an antenna into video and audio signals, there are arranged on a single circuit board a tuner circuit portion that converts the radio-frequency signal received by the antenna into an intermediate-frequency signal, a digital demodulating portion that converts the intermediate-frequency signal outputted from the tuner circuit portion into a compressed digital signal, a digital circuit portion that converts the compressed digital signal outputted from the digital demodulating portion into digital video and audio signals, and a video/audio output circuit that converts the digital video and audio signals outputted from the digital circuit portion into analog video and audio signals. This makes it possible to realize a receiver system provided with a video display apparatus having a simple configuration.
Description
Technical field
The present invention relates to receiver apparatus and receiver system, it is used to receive the radiofrequency signal such as digital TV broadcast signal.
Background technology
Fig. 5 is the block diagram that traditional receiver system structural feature is shown.Receiver system 900 shown in Fig. 5 comprises: be used for received RF signal antenna 901, be used for that the signal that is received by antenna 901 is carried out predetermined process and carry out predetermined process to extract the video display devices 903 of video and audio signal with the receiver apparatus 902 of the signal that obtains expectation and to the signal that receiver apparatus 902 obtains.
In having this tradition receiver system 900 of above-mentioned configuration, receiver apparatus 902 by being coated with radome (shield) by electromagnetic shielding.On the other hand, video display devices 903 is equipped with different functional blocks on its circuit board, i.e. video/audio processing IC 928, video/audio processing memory 926, program storage 927, video/audio output circuit 922, demonstration processing section 923 and Audio Processing part 924.Thereby this requires a large amount of elements and lead to be mounted and to be arranged on the circuit board of video display devices 903, needs to use multilayer circuit board thus.
And, be installed in the above-mentioned functions piece on the circuit board of video display devices 903, be video/audio processing IC 928, video/audio processing memory 926, program storage 927, video/audio output circuit 922, show processing section 923 and Audio Processing part 924, produce unnecessary electromagnetic radiation and noise, at this electromagnetic radiation and noise, need in video display devices 903, take measures, for example by extra radome is provided to it.
In addition, be installed in the above-mentioned functions piece on the circuit board of video display devices 903, just video/audio processing IC 928, video/audio processing memory 926, program storage 927, video/audio output circuit 922, show processing section 923 and Audio Processing part 924, also produce heat, at this heat, need take to be equipped with the measure of extra heating panel such as the area that increases circuit board or for it.
Summary of the invention
Consider the above-mentioned inconvenience that runs into traditionally, the purpose of this invention is to provide a kind of receiver system that is equipped with video display devices with simple structure.
To achieve these goals, according to an aspect of the present invention, a kind of receiver apparatus that will be converted to video and audio signal by the radiofrequency signal that antenna receives is equipped with: the tuner circuit part, and it will convert intermediate-freuqncy signal to by the radiofrequency signal that antenna receives; The digital demodulation part, it will convert compression digital signal to from the intermediate-freuqncy signal that tuner circuit is partly exported; The processing circuitry of intermediate frequency part, it will convert the sound intermediate frequency signal from the intermediate-freuqncy signal that tuner circuit is partly exported to; The digital circuit part, it will convert digital video and audio signal from the compression digital signal that digital demodulation is partly exported to; And the video/audio output circuit, it will convert analog video and audio signal to from digital video and the audio signal that digital circuit is partly exported.Here, described tuner circuit part, digital demodulation part, processing circuitry of intermediate frequency part, digital circuit part and video/audio output circuit are arranged on the single circuit board, and the end face of this single circuit board and bottom surface are covered by casing fully.
When on the circuit board that as mentioned above digital circuit part and video/audio output circuit is installed in receiver apparatus, according to be used for from the vision signal display video of receiver apparatus output and/or according to from the video display devices of the audio signal output audio frequency of receiver apparatus output only needs be equipped with: show the processing section, it is according to the vision signal display video of presenting from receiver apparatus; And the Audio Processing part, it is according to the audio signal output audio frequency of presenting from receiver apparatus, and this makes video display devices not need to be structured on the multilayer circuit board.And, can in receiver apparatus, take measures at the heat that produces by digital circuit part and video/audio output circuit, and therefore, in video display devices, need not to take to be equipped with the measure of extra heating panel such as the area that increases circuit board or for it at heat.And, need not that outside this has prevented to enter the tuner circuit part from the noise of receiver apparatus outside in order to arrange output from the signal of tuner circuit part at casing, thereby and prevent the deterioration of tuner circuit partial properties.Be equipped with the video display devices that input sound intermediate frequency signal is carried out the circuit of demodulation to show that the present invention is especially effective under the situation of video of reception in utilization.Single circuit board can be surrounded by casing, and this makes and can prevent more effectively that noise from the outside from entering the element on the circuit board.
According to the present invention, in described receiver apparatus, described processing circuitry of intermediate frequency part can comprise the intermediate frequency process IC that is used for intermediate-freuqncy signal is converted to the sound intermediate frequency signal; Described digital circuit part can comprise: the digital video of the video/audio processing IC of demodulation compressed digital video and audio signal and store compressed digital video and audio signal and demodulation and the video/audio processing memory of audio signal; Described digital demodulation part can comprise digital demodulation IC, and it is the processing IC that is used for intermediate-freuqncy signal is converted to digital signal.Here, described intermediate frequency process IC, video/audio processing IC and digital demodulation IC are arranged on the position that is separated from each other on the same installed surface.
Utilize this structure, can prevent to enter tuner circuit part and processing circuitry of intermediate frequency part, thereby prevent decreased performance by the digital noise that the video/audio processing memory produces.Can also disperse heat that produces by the digital demodulation IC that is provided in the digital demodulation part and the heat that produces by the video/audio processing IC that is provided in the digital circuit part,, thereby prevent decreased performance more effectively so that they distribute.
According to the present invention, in described receiver apparatus, described processing circuitry of intermediate frequency part can by with described video/audio processing IC and described digital demodulation IC electromagnetic shielding.
Utilize this structure, can prevent to enter processing circuitry of intermediate frequency, thereby prevent decreased performance by the digital noise that the video/audio processing memory produces.
According to the present invention, in described receiver apparatus, described video/audio processing IC and described digital demodulation IC can be arranged on the position that is separated from each other on the same installed surface, and described intermediate frequency process IC can be arranged on the face relative with the installed surface of arranging video/audio processing IC and digital demodulation IC.
Utilize this structure, can prevent to enter processing circuitry of intermediate frequency, thereby prevent decreased performance by the digital noise that the video/audio processing memory produces.
According to a further aspect in the invention, receive numeral and analog broadcast signal, convert them to video and audio signal and be equipped with according to the receiver system of their display videos and/or output audio: above-mentioned receiver apparatus; And video display devices, it is according to the vision signal display video from the output of described receiver apparatus, and/or according to the audio signal output audio frequency from described receiver apparatus output.
Description of drawings
By the following explanation of also carrying out in conjunction with the preferred embodiments with reference to accompanying drawing, it is clearer that these and other objects of the present invention and feature will become, in the accompanying drawing:
Fig. 1 is the block diagram that illustrates according to the structural feature of receiver system of the present invention;
Fig. 2 A is how schematically illustrated difference in functionality piece is installed in the view (from its end face) on the receiver apparatus 3 shown in Fig. 1;
Fig. 2 B is how schematically illustrated difference in functionality piece is installed in the view (from its bottom surface) on the receiver apparatus 3 shown in Fig. 1;
Fig. 3 is the view how schematically illustrated difference in functionality piece is installed in another example on the receiver apparatus 3 shown in Fig. 1;
Fig. 4 is the view how schematically illustrated difference in functionality piece is installed in another example on the receiver apparatus 3 shown in Fig. 1; And
Fig. 5 is the block diagram that the structural feature of traditional receiver system is shown.
Embodiment
Hereinafter, structure according to receiver system of the present invention is described with reference to the accompanying drawings.Fig. 1 is the block diagram that illustrates according to the structural feature of receiver system of the present invention.
The signal that receiver system 1 shown in Fig. 1 comprises the antenna 2 that is used for received RF signal, receive antenna 2 is carried out predetermined process with the receiver apparatus 3 that obtains video and audio signal and according to the vision signal display video of presenting from receiver apparatus 3 and/or according to the video display devices 4 of the audio signal output audio frequency of presenting from receiver apparatus 3.Antenna 2 is connected to the tuner input of receiver apparatus 3 via coaxial cable, and the interface end of receiver apparatus 3 is connected to video display devices 4.
Utilize said structure, receiver system 1 for example receives numeral and analog broadcast signal, converts them to the video and/or audio signal, and exports these signals (display video and output audio).
Fig. 2 is how schematically illustrated difference in functionality piece is installed in the view on the receiver apparatus 3 shown in Fig. 1.Fig. 2 A shows the receiver apparatus 3 of looking from one side (end face (top face)), and Fig. 2 B shows the receiver apparatus 3 of looking from its opposite side (bottom surface (bottom face)).
Shown in Fig. 2 A, receiver apparatus 3 is structured on the circuit board 50, and is placed with first barricade 51 on circuit board 50, so that be divided into by two parts of the shielding of mutual electromagnetic thus.
The end face of circuit board 50 and bottom surface can be covered fully by casing 70; Perhaps further, circuit board 50 can be enclosed in the casing 70; Perhaps circuit board 50 can be enclosed in the casing 70 basically hermetically.In above-mentioned any way, can minimize the noise that enters into the element on the circuit board 50 from the outside.
One side along second portion 61 also is equipped with connector 54.Except the I/O end of tuner circuit part 11, connector 54 also wraps and is installed in the functional block on the second portion 61, be digital demodulation part 12, digital circuit part 13, video/audio output circuit 14, processing circuitry of intermediate frequency part 15 and power unit 16, relevant input and output side.In connector 54, close first 60 arranges to have the IF output of tuner circuit part 11, and via this IF output output IF signal.In connector 54, arrange to have the output and the earth terminal of video/audio output circuit 14 away from first 60.
Utilize secondary shielding plate 52 with digital demodulation part 12 and the shielding of digital circuit part 13 mutual electromagnetic.The sampling multilayer circuit board is as circuit board 50, so that the digital demodulation IC 21 that will be provided in the digital demodulation part 12 via the interlayer that is laid on circuit board 50 inside (interlayer) conductor pattern is electrically connected mutually with the video/audio processing IC 24 that is provided in the digital circuit part 13.These two IC are installed on the position that is separated from each other on the same one side of circuit board 50.And the encapsulation of digital demodulation IC 21 and video/audio processing IC 24 contacts with casing 70 via the heat transfer component that is provided with therebetween separately.Therefore, the digitally distribution map of digital demodulation part 12 and digital circuit part 13 is electrically connected to casing 70 separately.
The connection of digitally distribution map on the circuit board 50 to the connection of casing 70 and above-mentioned simulation ground distribution map to casing 70 all utilizes the scolder that applies on described circuit board bottom surface to realize (seeing the solder joint 81 to 87 shown in Fig. 2 B).Here, the bottom surface of circuit board refers to the face of the less circuit board of the distance of capping, in other words, is meant the less face of height with respect to the side of casing.Be welded with the possibility that reduces welding robot or tool in contact casing side in the manufacture process that helps at receiver in execution on the bottom surface of circuit board.This has guaranteed efficient installation.
Here, shown in Fig. 2 B, the point that the ground distribution map is connected to casing is not only to be positioned on the limit of circuit board 50, but be positioned at it two and more a plurality of limit on.This has increased the quantity of the tie point between casing and the ground distribution map, thereby helps to reduce to connect impedance.In the example shown in Fig. 2 B, solder joint is positioned on all limits of circuit board.This tie point that allows number to increase is distributed on the wider zone effectively, thereby helps to reduce impedance.
In connector 54, the power end of tuner circuit part 11, digital demodulation part 12, digital circuit part 13 and video/audio output circuit 14 is arranged between the IF output of the output of video/audio output circuit 14 and tuner circuit part 11.
Utilize such structure, because digital circuit part 13 and video/audio output circuit 14 are installed on the circuit board of receiver apparatus 3, therefore video display devices 4 only needs to comprise the video processing part 31 and the Audio Processing part 32 that is used for according to the audio signal output audio frequency of presenting from receiver apparatus 3 that is used for according to the vision signal display video of presenting from receiver apparatus 3 now.This has eliminated for the needs that adopt multilayer circuit board in video display devices 4.In traditional structure, because digital circuit partly is provided in the video display devices, therefore need in video display devices, take measures unnecessary electromagnetic radiation and the noise that produces at by video/audio processing IC, video/audio processing memory, program storage etc.On the contrary, utilize according to structure of the present invention, digital circuit partly is provided in the receiver apparatus, so video display devices can need not to dispose digital circuit part.This has eliminated in video display devices the needs of taking measures at unnecessary electromagnetic radiation and noise.
And receiver apparatus 3 comprises processing circuitry of intermediate frequency part 15, and it is used for the IF conversion of signals is become the SIF signal.This makes the SIF signal to be electrically connected with the video display devices that is equipped with demodulator circuit.
The digital demodulation IC 21 and the video/audio processing IC 24 that are installed on the circuit board of receiver apparatus 3 are connected to casing 70 via the heat transfer component that is arranged on therebetween separately.Therefore, taked the measure of the heat that encapsulation produces at IC.On the other hand, in the video display devices that no longer needs to be equipped with the IC encapsulation, need not to take at heat again such as increasing board area or being equipped with the measure of extra heating panel to it.
Utilization is according to structure of the present invention, in receiver apparatus, and the first 60 that constitutes by analog circuit and shield mutually by the second portion 61 that digital circuit constitutes.This has prevented to enter the tuner circuit part by the digital noise that digital demodulation part and digital circuit partly produce, thereby helps to prevent the decreased performance of tuner circuit part.
Simulation ground distribution map and digitally distribution map be electrically connected to casing 70 separately.This has eliminated for ground connection connects they has been connected to the needs of the connector 54 that is provided on the second portion 61, and help to reduce simulation ground and digitally between impedance.
Intermediate frequency process IC 25, video/audio processing IC 24 and digital demodulation IC 21 are arranged on the position that is separated from each other on the same installed surface.This helps by the distributing of the heat that is provided in the digital demodulation IC 21 in the digital demodulation part 12 and is produced by the video/audio processing IC 24 that is provided in the digital circuit part 13, thereby helps more effectively to prevent decreased performance.
Fig. 3 shows the improvement embodiment to the embodiment shown in Fig. 2 A.Here, as shown in Figure 3, utilize the 3rd barricade 55 that digital demodulation part 12 and processing circuitry of intermediate frequency part 15 are shielded mutually.This has prevented to enter intermediate frequency process IC 25 by the digital noise that digital demodulation part 12 produces, thereby helps to prevent decreased performance.
Fig. 4 shows the improvement embodiment to the embodiment shown in Fig. 2 B.Here, as shown in Figure 4, intermediate frequency process IC 25 is arranged on the circuit board on the face different with the face of arranging to have video/audio processing IC 24 and digital demodulation IC 21 (in Fig. 4, intermediate frequency process IC 25 is arranged on the bottom surface of circuit board, and video/audio processing IC 24 and digital demodulation IC 21 are arranged on the end face of circuit board).This structure has prevented to enter processing circuitry of intermediate frequency part 15 by the digital noise that digital demodulation part 12 or digital circuit part 13 produce, thereby helps to prevent decreased performance.
Utilize first barricade 51 that first 60 and second portion 61 are shielded mutually.This has prevented to enter the tuner circuit part 11 that is installed in the first 61 by being installed in the unnecessary electromagnetic radiation that digital demodulation part 12 on the second portion 61 or digital circuit part 13 produce.
In addition, on second portion 61, utilize secondary shielding plate 52 that digital demodulation part 12 and digital circuit part 13 are shielded mutually.This helps to prevent that the unnecessary electromagnetic radiation by digital circuit part 13 produces from entering digital demodulation part 12.
According to the said structure as the embodiment of the invention, the digital circuit part and the video/audio output circuit that are included in traditionally in the video display devices have been installed on the circuit board of receiver apparatus.This makes that can utilize single layer board to replace multilayer circuit board realizes video display devices.In addition, no longer need Video processing IC is installed on the circuit board of video display devices, therefore need not to take measures at the heat that distributes from this IC.Therefore, can realize having the receiver system of video display devices simple in structure.In addition, the processing circuitry of intermediate frequency part that is used for intermediate-freuqncy signal is converted to the sound intermediate frequency signal in receiver apparatus, is equipped with now.This makes and the sound intermediate frequency signal can be electrically connected with the video display devices that is equipped with demodulator circuit.
Claims (6)
1, a kind of radiofrequency signal that antenna is received converts the receiver apparatus of video and audio signal to, it is characterized in that being equipped with:
The tuner circuit part, it will convert intermediate-freuqncy signal to by the radiofrequency signal that antenna receives;
The digital demodulation part, it will convert compression digital signal to from the intermediate-freuqncy signal that tuner circuit is partly exported;
The processing circuitry of intermediate frequency part, it will convert the sound intermediate frequency signal from the intermediate-freuqncy signal that tuner circuit is partly exported to;
The digital circuit part, it will convert digital video and audio signal from the compression digital signal that digital demodulation is partly exported to; And
The video/audio output circuit, it will convert analog video and audio signal to from digital video and the audio signal that digital circuit is partly exported,
It is characterized in that
Tuner circuit part, digital demodulation part, processing circuitry of intermediate frequency part, digital circuit part and video/audio output circuit are arranged on the single circuit board, and
The end face and the bottom surface of this single circuit board are covered by casing fully.
2, receiver apparatus as claimed in claim 1 is characterized in that,
Described single circuit board is surrounded by casing.
3, receiver apparatus as claimed in claim 1 or 2,
It is characterized in that:
Described processing circuitry of intermediate frequency partly comprises the intermediate frequency process IC that is used for intermediate-freuqncy signal is converted to the sound intermediate frequency signal,
Described digital circuit partly comprises:
The video/audio processing IC, its demodulation compressed digital video and audio signal; And
The video/audio processing memory, the digital video and the audio signal of its store compressed digital video and audio signal and demodulation,
Described digital demodulation portion branch comprises digital demodulation IC, and it is the processing IC that is used for intermediate-freuqncy signal is converted to digital signal, and
Described intermediate frequency process IC, video/audio processing IC and digital demodulation IC are arranged on the position that is separated from each other on the same installed surface.
4, receiver apparatus as claimed in claim 3 is characterized in that,
Described processing circuitry of intermediate frequency part quilt and described video/audio processing IC and described digital demodulation IC electromagnetic shielding.
5, receiver apparatus as claimed in claim 1 or 2,
It is characterized in that:
Described processing circuitry of intermediate frequency partly comprises the intermediate frequency process IC that is used for intermediate-freuqncy signal is converted to the sound intermediate frequency signal,
Described digital circuit partly comprises:
The video/audio processing IC, its demodulation compressed digital video and audio signal; And
The video/audio processing memory, the digital video and the audio signal of its store compressed digital video and audio signal and demodulation,
Described digital demodulation portion branch comprises digital demodulation IC, and it is the processing IC that is used for intermediate-freuqncy signal is converted to digital signal,
Described video/audio processing IC and described digital demodulation IC are arranged on the position that is separated from each other on the same installed surface, and
Described intermediate frequency process IC is arranged on the face relative with the installed surface of arranging video/audio processing IC and digital demodulation IC.
6, a kind of receiver system, it receives numeral and analog broadcast signal, converts them to video and audio signal, and according to their display videos and/or output audio,
Described receiver system is characterised in that and is equipped with:
Receiver apparatus as claimed in claim 1 or 2; And
Video display devices, it is according to the vision signal display video from the output of described receiver apparatus, and/or according to the audio signal output audio frequency from described receiver apparatus output.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP073656/06 | 2006-03-17 | ||
JP2006073656A JP2007251702A (en) | 2006-03-17 | 2006-03-17 | Receiving apparatus, receiving system |
Publications (1)
Publication Number | Publication Date |
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CN101039386A true CN101039386A (en) | 2007-09-19 |
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ID=38517371
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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CNA200610168688XA Pending CN101039386A (en) | 2006-03-17 | 2006-12-22 | Receiver apparatus and receiver system |
Country Status (3)
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US (1) | US20070216806A1 (en) |
JP (1) | JP2007251702A (en) |
CN (1) | CN101039386A (en) |
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JP4338710B2 (en) * | 2006-03-27 | 2009-10-07 | シャープ株式会社 | Receiver and receiver system |
US7408495B2 (en) * | 2006-05-15 | 2008-08-05 | Guzik Technical Enterprises | Digital equalization of multiple interleaved analog-to-digital converters |
-
2006
- 2006-03-17 JP JP2006073656A patent/JP2007251702A/en active Pending
- 2006-12-01 US US11/607,011 patent/US20070216806A1/en not_active Abandoned
- 2006-12-22 CN CNA200610168688XA patent/CN101039386A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102006435A (en) * | 2009-08-27 | 2011-04-06 | 夏普株式会社 | Reception module and reception apparatus including the same |
CN112014890A (en) * | 2020-08-28 | 2020-12-01 | 福建平潭旭坤实业有限公司 | Anti-electromagnetic interference device and method for radio wave perspective instrument receiver |
Also Published As
Publication number | Publication date |
---|---|
JP2007251702A (en) | 2007-09-27 |
US20070216806A1 (en) | 2007-09-20 |
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